towerless
1. Conversion and Speed Governing Applicable for the Fixed Pressure in Centralized Heat Suply System and Towerless Water Supply in Block
变频调速技术用于集中供热系统定压和小区无塔供水
2. towerless phase-calibration
无塔校相
3. Towerless Calibration Technology for Vessel Track and Control Radar at Sea
船载测控雷达海上无塔校相技术